Application
This unit involves the skills and knowledge required to establish the thermodynamic parameters of refrigeration and air conditioning system. It includes determining thermodynamic parameters of refrigeration and air conditioning system using measurement and calculation methods and documenting results. No licensing, legislative or certification requirements apply to this unit at the time of publication. |
Elements and Performance Criteria
Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. | ||
Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are identified and applied | |||
WHS/OHS risk control measures and workplace procedures are followed in preparation for refrigeration and air conditioning system work | |||
Refrigeration and air conditioning system operating conditions are obtained from documentation or work supervisor to determine the scope of work to be undertaken | |||
Advice is sought from the work supervisor to ensure refrigeration and air conditioning system work is coordinated effectively with others | |||
Tools, equipment and testing devices needed to determine the refrigeration and air conditioning system operating conditions are obtained and checked for correct operation and safety | |||
WHS/OHS risk control measures and workplace procedures for carrying out refrigeration and air conditioning system work are followed | |||
Measurement of thermodynamic system operating parameters is conducted in accordance with WHS/OHS requirements and workplace safety procedures | |||
System is checked and isolated in accordance with WHS/OHS requirements and workplace procedures | |||
Actual and specified range of thermodynamic parameters are determined from measured and calculated values as they apply to refrigeration or air conditioning system in accordance to workplace procedures | |||
Unexpected situations are discussed with appropriate person/s, responded to in accordance with workplace procedures and documented in a manner that minimises risk to personnel and equipment | |||
Thermodynamic parameters are determined without damage to apparatus, circuits, the surrounding environment or services using sustainable energy practices | |||
WHS/OHS work completion risk control measures and workplace procedures are followed | |||
Worksite and equipment are cleaned and made safe in accordance with workplace procedures | |||
Thermodynamic parameters are documented, including identification of any parameter that is not within the specified range for the refrigeration and air conditioning system | |||
Work supervisor is notified of work completion in accordance with workplace procedures |
Evidence of Performance
Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include: |
selecting and using appropriate measuring devices correctly interpreting measurements using calculation methods accurately identifying parameters not within the specified range documenting thermodynamic parameters correctly dealing with unplanned events applying relevant work health and safety (WHS)/occupational health and safety (OHS) workplace procedures requirements, including the use of risk control measures applying sustainable energy principles and practices planning to determine thermodynamic parameters of refrigeration and air conditioning system. |
Evidence of Knowledge
Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of: |
thermodynamic parameters of refrigeration and air conditioning systems, engineering mathematics fundamentals and refrigeration science, including: arithmetic: rational and irrational numbers, surds International System of Units (SI) units and conversion using unity brackets laws of indices (base 10), scientific and engineering notation estimations, errors and approximations, and significant figures algebra: substitution +, -, x on simple polynomials and simple indices expanding brackets factorising quadratics, common factors and difference of two squares simplifying algebraic fractions transposition of engineering formulae solving one variable equations simple algebraic division geometry: Pythagoras Theorem angles: degrees, radians and parallel lines cut by a transverse triangles: sum of angles, and properties of equilateral and isosceles triangles congruent triangles similar triangles: ratio of corresponding sides sin, cos, tan: ratios of a right-angled triangle sine and cosine rules circles: circumference, arcs, chords, tangents and circle theorems area and perimeter mensuration on above figures coordinate geometry: 2-D plane; x-y axes and s-t axes graph of linear function, y = ax + b and functional notation, y = f(x) straight line given slope and one point or given two points linear equations: solving algebraically and geometrically solving two linear functions simultaneously, algebraically and geometrically line segment: length and mid-point engineering mechanics: mass/density weight forces specific gravity equilibrium momentum friction loss velocity and speed energy in all forms mechanical advantage efficiency pressure/stress molecular theory: changes of state sublimation expansion and contraction electron flow state of aggregation internal potential energy phase change diagrams thermodynamics: temperature scales conservation of energy specific heat sensible, latent and super heat properties of steam enthalpy heat energy/temperature relationship heat balance on a body heat transfer conductivity calorimetry peltier effect 1st and 2nd law of thermodynamics gas laws and liquids: pressure Boyles law Charles law volumetric relationship psychrometrics latent heat of vaporisation relative humidity air conditioning processes dynamic pressure loss velocity and static pressure bourdon tubes density and relative density Archimedes principle Bernoulli’s equation manometers absorption refrigeration centrifugal compression external work of a liquid pressure volume diagrams isothermal and adiabatic processes polytropic processes Dalton’s law of partial pressure vapour compression: pressure/enthalpy relationship entropy characteristics of evaporation and condensation compression and pressure drop phases co-efficient of performance theoretical/practical cycles characteristics of refrigerants theoretical power input pressure losses heat exchange effects of condensing condition changes sub-cooling and superheating relevant job safety assessments or risk mitigation processes relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures. |
Assessment Conditions
Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment. Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment. Assessment must occur in workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated workplace operational situations that replicate workplace conditions. Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate. Resources for assessment must include access to: a range of relevant exercises, case studies and/or other simulations relevant and appropriate materials, tools, equipment and personal protective equipment (PPE) currently used in industry applicable documentation, including workplace procedures, equipment specifications, regulations, codes of practice and operation manuals. |
Foundation Skills
Foundation skills essential to performance are explicit in the performance criteria of this unit of competency. |
Range Statement
Range is restricted to essential operating conditions and any other variables essential to the work environment. Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide. | |
Determining thermodynamic parameters of refrigeration and air conditioning systems must include at least the following: | using measurement and calculation methods of a refrigeration or air conditioning system, including: temperature pressure relative humidity enthalpy |
Sectors
Electrotechnology |
Competency Field
Refrigeration and air-conditioning |